Development of an intelligent style of precision maize seeder

Name :Duanyang Geng

Tel: 13668641238

EMAIL ： dygxt@163.com

The most embarrassing problems

•Planting spacing uneven

•Alarming problem

•Sowing depth is difficult to guarantee

conclusion : To develop an intelligent style of accurate maize seeder is very important.

Contents

1) To design the whole frame of the intelligent style of precision maize seeder

2) The intelligent controlling system of accurate seed-metering device

3) Fault alarm system

4) The intelligent control system of sowing depth

5) Conclusions

To design the whole frame of the intelligent style of precision maize seeder

1)The precision seed-metering is designed to be driven by a servo

motor instead of traditional land wheel driven system which may

avoid the influence of land-wheel slip to the sowing quality.

2) The sowing depth is controlled by the adjustable earth-covering

device which may adjust the press power and the sowing depth.

3) The alarming device is set in front of the cleaning roller which will

send an audible alarm when the accumulated straw presses the

chosen spring to make the touch switch closed.

1.furrower 2.cleaning roller 3.alarming device 4.servo motor 5.intermediate shaft 6.seedbox 7.pressure sensor 8.press wheel 9.covering device 10. electric cylinder 11. seed-metering device

The frame of intelligent style of precision maize seeder

The intelligent controlling system of seed-metering device

In the controlling system, the vehicle speed was firstly detected by the hall sensor, and the rotating speed of maize seed-metering device was controlled according to the vehicle speed by the single chip, which may meet the requirement of both the planting space and the maize number of unit area.

start

Input planting distance

Nw>0？

Delay

System Initialization

Speed of tractor

NY

Rotating speed of motor

The intelligent control system of sowing depth

When the pressure of press wheel which is measured by

the pressure sensor is changed, the computer will send a

control signal to transform the length of electric cylinder and

to change the covering soil which may meet both the depth

and the press power of corn seeder.

Fixed variable+

Comparator

ControllerExecutive mechaniam

Executive electric cylinder

Controlled object

The location of covering device

Detecting deviceDetection of pressure

Feedback

-Negative feedback

Fault alarm system

When there is too much straw at the former of furrower that the straw pressure force to the pressure plate is greater than the pre-set value of the pre-pressed spring, the pressure plate will push down the tappet, and the tappet will push down the alarm contact which may lead the alarm system to make an audile alarm.

1.furrower 2.column 3.straw clear roller 4.press plate 5.spring 6.tappet 7.alarming contact

In this alarming system, it was

thought that the common

pressure sensor may be

influenced by the field-dust and

brought a fault alarm, so the

pressure sensor was selected as

an adjustable spring instead of

the traditional sensor which may

reduce the occurrence of the false

alarm in the process of operation.

Conclusions

(1) The intelligent style of precision maize seeder was designed which may improve the sowing quality.

(2) The intelligent metering system based on motor-driven can improve the consistency of planting space because the seed-metering device is driven by the servo motor which can avoid the slipping interference of land wheel of maize seeder.

(3) The intelligent alarming system can improve the working reliability of no-tillage maize seeder because the force sensor is used in the system which can prevent the alarm system from making a false alarm.

(4) The intelligent control system of sowing depth can improve the consistency of the sowing depth and intension of the compaction which may create a good growth environment.